Conservative Party (Prussia)
The Conservative Party (German: Konservative Partei) was a political party in Prussia which was founded in 1848 by the relatively loose cooperation of conservative associations, groups and members of parliament. In 1866 the Free Conservative Party (known as the German Reich Party in the Reichstag from 1871) split from the Conservatives, who were then called Old Conservatives.
Source: Wikipedia — Conservative Party (Prussia) (CC BY-SA 4.0)